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GPT 5.1 Codex Mini

GPT 5.1 Codex Mini is the lightweight, fast variant in the GPT-5.1 codex family, optimized for routine coding tasks like bug fixes, feature scaffolding, and test generation at a cost that scales to high-frequency CI and development workflows.

ReasoningFile InputVision (Image)Tool UseImplicit Caching
index.ts
import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.1-codex-mini',
  prompt: 'Why is the sky blue?'
})
OverviewPlaygroundAboutProvidersThroughputLatencyUptimeStatusSimilarFAQ

Providers

Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.

Provider
Context
Latency
Throughput
Input
Output
Cache
Web Search
Per Query
Capabilities
ZDR
No Training
Release Date
Azure
Legal:Terms
•
Privacy
400K
4.4s
19tps
$0.25/M$2.00/M
Read:$0.03/M
Write:—
$14/K
+ input costs
—
11/12/2025
OpenAI
Legal:Terms
•
Privacy
400K
0.8s
$0.25/M$2.00/M
Read:$0.03/M
Write:—
$10.00/K
+ input costs
—
11/12/2025